Ecoboost Performance Forum

Thinking about a way to go about testing the injectors in the most cost effective way. There are some places like injector rx which charges $25 each DI injector, also have a place near me. New ones are $80 each which gets expensive quick.

Nearing 100k, feel like this is on the todo, this is stemming from my trims being higher than expected and the difference between banks. Feels like a warning sign. Also the last plausible cause of my fuel weirdness that is untested.

Whitch hunter performance was a company I used a while back

Expensive and unsafe to DIY test due to high pressure design, but any shop set up for common rail should be able to check out GDI injectors.

Quote from: AJP turbo on November 29, 2018, 12:50:01 AM
Whitch hunter performance was a company I used a while back

Their website says no GDI

https://www.southbayfuelinjectors.com/service/clean-flow-test (https://www.southbayfuelinjectors.com/service/clean-flow-test)

http://greentuneautomotive.com/wp-content/uploads/2015/11/Understanding-Testing-of-Aftermarket-GDI-Injectors.pdf (http://greentuneautomotive.com/wp-content/uploads/2015/11/Understanding-Testing-of-Aftermarket-GDI-Injectors.pdf)

https://www.picoauto.com/library/automotive-guided-tests/gasoline-direct-injection-injector-voltage-and-current (https://www.picoauto.com/library/automotive-guided-tests/gasoline-direct-injection-injector-voltage-and-current)

Quote2009-04-20
Engine Test for Accelerated Fuel Deposit Formation on Injectors Used in Gasoline Direct Injection Engines 2009-01-1495
An accelerated fuel injector deposit formation test was developed to understand fuel deposit formation on fuel injectors for Gasoline Direct injection engines. As part of the test development, both a side mount and a central mount Gasoline Direct injection style 4 cylinder engines were operated in homogeneous mode. Initial attempts to form plugging deposits by running the engine continuously resulted in significant deposits forming on the exterior surface of the Gasoline Direct injection fuel injector tip; however, these deposits did not impact fuel flow.

Ultimately, Gasoline Direct injection injector plugging was successfully accomplished using a test similar to the Port Fuel Injector test cycle presented in SAE 2005-01-3841 (1), "Development of a Robust Injector Design for Superior Deposit Resistance". Test cycles included run time to reach operating temperature followed by engine soak and cool-down. Engine soak and injector tip temperatures were determined to be the most important factors contributing to injector plugging.

This engine test, used in conjunction with Delphi's gasoline deposit-forming fuel, resulted in an accelerated, repeatable test that formed fuel deposits resulting in fuel injector lean flow shift. Fuel deposit location and chemistry replicated deposits found on fuel injectors operated in the real world.

DOI: https://doi.org/10.4271/2009-01-1495 (https://doi.org/10.4271/2009-01-1495)
Citation: Von Bacho, P., Sofianek, J., Galante-Fox, J., and McMahon, C., "Engine Test for Accelerated Fuel Deposit Formation on Injectors Used in Gasoline Direct Injection Engines," SAE Technical Paper 2009-01-1495, 2009, https://doi.org/10.4271/2009-01-1495. (https://doi.org/10.4271/2009-01-1495.)
Download Citation
Author(s): Paul S. Von Bacho, Jay K. Sofianek, Julie M. Galante-Fox, Charles J. McMahon
Affiliated: Delphi Powertrain Systems
Pages: 5
Event: SAE World Congress & Exhibition
Also in: SI Combustion and Direct Injection SI Engine Technology, 2009-SP-2241

FWIW I usually throw a bottle of BG- GDI fuel system Cleaner or Chevron with techron cleaner @ every oil change interval for a peace of mind! It certainly can't hurt! Glad to see ya posting once again.  Z   :)